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Author
LaCasce, J.H. ; Escartin, J. ; Chassignet, E.P. ; Xu, X.
Title
Jet instability over smooth, corrugated and realistic bathymetry
Type
$loc['typeJournal Article']
Year
2018
Publication
Journal of Physical Oceanography
Abbreviated Journal
J. Phys. Oceanogr.
Volume
Issue
Pages
Keywords
Abstract
The stability of a horizontally- and vertically-sheared surface jet is examined, with a focus on the vertical structure of the resultant eddies. Over a flat bottom, the instability is mixed baroclinic/barotropic, producing strong eddies at depth which are characteristically shifted downstream relative to the surface eddies. Baroclinic instability is suppressed over a large slope for retrograde jets (with a flow anti-parallel to topographic wave propagation), and to a lesser extent for prograde jets (with flow parallel to topographic wave propagation), as seen previously. In such cases, barotropic (lateral) instability dominates if the jet is sufficiently narrow. This yields surface eddies whose size is independent of the slope but proportional to the jet width. Deep eddies still form, forced by interfacial motion associated with the surface eddies, but they are weaker than under baroclinic instability and are vertically aligned with the surface eddies. A sinusoidal ridge acts similarly, suppressing baroclinic instability and favoring lateral instability in the upper layer. A ridge with a 1 km wavelength and an amplitude of roughly 10 m is sufficient to suppress baroclinic instability. Surveys of bottom roughness from bathymetry acquired with shipboard multibeam echosounding reveal that such heights are common, beneath the Kuroshio, the Antarctic Circumpolar Current and, to a lesser extent, the Gulf Stream. Consistent with this, vorticity and velocity cross sections from a 1/50° HYCOM simulation suggest that Gulf Stream eddies are vertically aligned, as in the linear stability calculations with strong topography. Thus lateral instability may be more common than previously thought, due to topography hindering vertical energy transfer.
Address
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Summary Language
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Series Editor
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Edition
ISSN
0022-3670
ISBN
Medium
Area
Expedition
Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ user @
Serial
998
Permanent link to this record
Author
Langland, R.H. ; Maue, R.N. ; Bishop, C.H.
Title
Uncertainty in atmospheric temperature analyses
Type
$loc['typeJournal Article']
Year
2008
Publication
Tellus A
Abbreviated Journal
Volume
60
Issue
4
Pages
598-603
Keywords
Abstract
Address
Corporate Author
Thesis
Publisher
Place of Publication
Editor
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Summary Language
Original Title
Series Editor
Series Title
Abbreviated Series Title
Series Volume
Series Issue
Edition
ISSN
0280-6495
ISBN
Medium
Area
Expedition
Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
684
Permanent link to this record
Author
LaRow, T. E., Y.-K. Lim, D. W. Shin, S. D. Cocke, and E. Chassignet
Title
High resolution ensemble west Atlantic basin seasonal hurricane simulations
Type
$loc['typeReport']
Year
2007
Publication
Research Activities in Atmospheric and Ocean Modeling
Abbreviated Journal
Volume
Issue
Pages
6-03
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Abstract
Address
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Thesis
Publisher
CAS/JSC Working Group on Numerical Experimentation
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ISBN
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Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
703
Permanent link to this record
Author
LaRow, T. E. ; Cocke, S.
Title
Methods for Multi¬Model Proxies for Climate Studies
Type
$loc['typeNewspaper Article']
Year
2004
Publication
CLIVAR Exchanges Newsletter
Abbreviated Journal
Volume
Issue
Spring
Pages
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Abstract
Address
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Thesis
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Place of Publication
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Summary Language
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Series Editor
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Series Issue
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ISSN
ISBN
Medium
Area
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Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
887
Permanent link to this record
Author
LaRow, T. E. ; Cocke, S. D.
Title
Simulation of the 1997/98 and 1991/92 ENSO event using a Coupled Ocean-Atmosphere Regional Spectral Model
Type
$loc['typeReport']
Year
1999
Publication
Abbreviated Journal
Volume
Issue
Pages
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Abstract
Address
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Thesis
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Place of Publication
Editor
Ritchie, H.
Language
Summary Language
Original Title
Series Editor
Series Title
Research Activities in Atmospheric and Oceanic Modelling
Abbreviated Series Title
Series Volume
Series Issue
Edition
ISSN
ISBN
Medium
Area
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Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
774
Permanent link to this record
Author
LaRow, T. E. ; Cocke, S. ; Shin, D. W.
Title
Multi-convection as a multi-model proxy for seasonal climate studies
Type
$loc['typeMagazine Article']
Year
2003
Publication
CLIVAR Exchanges
Abbreviated Journal
Volume
28
Issue
Pages
Keywords
Abstract
Address
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Summary Language
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Series Editor
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ISSN
ISBN
Medium
Area
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Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
867
Permanent link to this record
Author
Latif, M. ; Anderson, D. ; Barnett, T. ; Cane, M. ; Kleeman, R. ; Leetmaa, A. ; O'Brien, J. ; Rosati, A. ; Schneider, E.
Title
A review of the predictability and prediction of ENSO
Type
$loc['typeJournal Article']
Year
1998
Publication
Journal of Geophysical Research: Oceans
Abbreviated Journal
J. Geophys. Res.
Volume
103
Issue
C7
Pages
14375-14393
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Abstract
Address
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Publisher
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Summary Language
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Series Editor
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Series Issue
Edition
ISSN
0148-0227
ISBN
Medium
Area
Expedition
Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
746
Permanent link to this record
Author
Laurencin, C. ; Misra, V.
Title
Characterizing the Variations of the motion of the North Atlantic tropical cyclones
Type
$loc['typeJournal Article']
Year
2018
Publication
Meteorology and Atmospheric Physics
Abbreviated Journal
Meteorol Atmos Phys
Volume
130
Issue
303
Pages
1-12
Keywords
climatology ; interannual scales ; environment
Abstract
In this study, we examine the seasonal and interannual variability of the North Atlantic (NATL) tropical cyclone (TC) motion from the historical Hurricane Database (HURDAT2) over the period 1988-2014. We characterize these motions based on their position, lifecycle, and seasonal cycle. The main findings of this study include: (1) of the 11,469 NATL TC fixes examined between 1988 and 2014, 81% of them had a translation speed of < 20 mph; (2) TCs in the deep tropics of the NATL are invariably slow-moving in comparison with TCs in higher latitudes. Although fast-moving TCs (> 40 mph) are exclusively found north of 30 N, the slow-moving TCs have a wide range of latitude. This is largely a consequence of the background steering flow being weaker (stronger) in the tropical (higher) latitudes with a minimum around the subtropical latitudes of NATL; (3) there is an overall decrease in the frequency of all categories of translation speed of TCs in warm relative to cold El Niño Southern Oscillation (ENSO) years. However, in terms of the percentage change, TCs with a translation speed in the range of 10-20 mph display the most change (42%) in warm relative to cold ENSO years; and (4) there is an overall decrease in frequency across all categories of TC translation speed in small relative to large Atlantic Warm Pool years, but in terms of percentage change in the frequency of TCs, there is a significant and comparable change in the frequency over a wider range of translation speeds than the ENSO composites. This last finding suggests that Atlantic Warm Pool variations have a more profound impact on the translation speed of Atlantic TCs than ENSO.
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ISBN
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Approved
$loc['no']
Call Number
COAPS @ rl18 @
Serial
991
Permanent link to this record
Author
Laxenaire, R., Speich, S., & Alexandre S
Title
Evolution of the thermohaline structure of one Agulhas Ring reconstructed from satellite altimetry and Argo floats. Journal of Geophysical Research
Type
$loc['typeJournal Article']
Year
2019
Publication
Oceans
Abbreviated Journal
Volume
124
Issue
12
Pages
8969-9003
Keywords
Abstract
Address
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Thesis
Publisher
Place of Publication
Editor
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Summary Language
Original Title
Series Editor
Series Title
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Series Volume
Series Issue
Edition
ISSN
ISBN
Medium
Area
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Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ user @
Serial
1096
Permanent link to this record
Author
Le Sommer, Julien ; Chassignet, E.P. ; Wallcraft, A. J.
Title
Ocean Circulation Modeling for Operational Oceanography: Current Status and Future Challenges
Type
$loc['typeBook Chapter']
Year
2018
Publication
New Frontiers in Operational Oceanography
Abbreviated Journal
Volume
Issue
Pages
289-305
Keywords
OCEAN MODELING ; OCEAN CIRCULATION ; PARAMETERIZATIONS
Abstract
This chapter focuses on ocean circulation models used in operational oceanography, physical oceanography and climate science. Ocean circulation models area particular branch of ocean numerical modeling that focuses on the representation of ocean physical properties over spatial scales ranging from the global scale to less than a kilometer and time scales ranging from hours to decades. As such, they are an essential build-ing block for operational oceanography systems and their design receives a lot of attention from operational and research centers.
Address
Corporate Author
Thesis
Publisher
GODAE OceanView
Place of Publication
Tallahassee, FL
Editor
Chassignet, E. P., A. Pascual, J. Tintoré, and J. Verron
Language
Summary Language
Original Title
Series Editor
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Abbreviated Series Title
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Series Issue
Edition
ISSN
ISBN
Medium
Area
Expedition
Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ user @
Serial
948
Permanent link to this record